You are going to have to let us more. Tractor serial numbers have never been published but every time I see one I stick it into a Database Table if I know what model the tractor is. There was a model 211-4 built in 1989 with a 45635 serial number and it is model 32-11B403. These models had a data decal on the rear fender pan under the seat.
Go here
https://lookup3.toro.com/partdex/index.cfm?xCaller=ToroEnter the 32-11B403 written like that and the parts lists and more will come up. Is that what you have?
If not post all the numbers you can find on the engine data plate and will see if we can ID it that way.
Garry